/* this is for power gating */
int gpu_power_enable(void)
{
#ifdef CONFIG_PM_RUNTIME
int err;
int try_count = 50;
err = pm_runtime_get_sync(&gpsPVRLDMDev->dev);
if (err && pm_runtime_suspended(&gpsPVRLDMDev->dev)) {
PVR_DPF((PVR_DBG_ERROR, "Error in pm_runtime_get_sync"));
return err;
}
do { /* wait for gpu power turned on */
if (!pm_runtime_suspended(&gpsPVRLDMDev->dev))
break;
if (try_count == 0)
PVR_LOG(("enable_gpu_power on fail with pm_runtime_suspended"));
schedule();
} while (try_count--);
/*this is debug for runtimepm power gating state*/
{
void __iomem *status;
status = EXYNOS_PMUREG(0x4080);
sgx_gpu_power_state = __raw_readl(status);
#ifdef PM_RUNTIME_DEBUG
PVR_LOG(("enable_gpu_power: read register: 0x%x", sgx_gpu_power_state));
#endif
}
#endif
return 0;
}
static int exynos_power_up_cpu(unsigned int cpu)
{
unsigned int timeout;
unsigned int val;
unsigned int tmp;
void __iomem *power_base;
power_base = cpu_boot_info[cpu].power_base;
if (power_base == 0)
return -EPERM;
val = __raw_readl(power_base + 0x4);
if (!(val & EXYNOS_CORE_LOCAL_PWR_EN)) {
tmp = __raw_readl(power_base);
tmp |= (EXYNOS_CORE_LOCAL_PWR_EN);
tmp |= (EXYNOS_CORE_AUTOWAKEUP_EN);
__raw_writel(tmp, power_base);
/* wait max 10 ms until cpu is on */
timeout = 10;
while (timeout) {
val = __raw_readl(power_base + 0x4);
if ((val & EXYNOS_CORE_LOCAL_PWR_EN) ==
EXYNOS_CORE_LOCAL_PWR_EN)
break;
/* HACK for TRUSTZONE: After Bootup, the hotplug out works but while
* hotplugging in we have to write twice to power_base reg
*/
#if defined(CONFIG_SOC_EXYNOS4415) && defined(CONFIG_ARM_TRUSTZONE)
__raw_writel(tmp, power_base);
#endif
mdelay(1);
timeout--;
}
if (timeout == 0) {
printk(KERN_ERR "cpu%d power up failed", cpu);
return -ETIMEDOUT;
}
}
#if !defined(CONFIG_MACH_GARDA)
/*
* Check Power down cpu wait on WFE, and occur SW reset
*/
if (soc_is_exynos3470() || soc_is_exynos3250()) {
while(!__raw_readl(EXYNOS_PMUREG(0x0908)))
udelay(10);
udelay(10);
tmp = __raw_readl(power_base + 0x4);
tmp |= (0x3 << 8);
__raw_writel(tmp, power_base + 0x4);
/* TODO set COREX's WAKEUP_FROM_LOCAL_CFG register with 0x3 */
printk("cpu%d: SWRESET\n", cpu);
__raw_writel(((1 << 4) << cpu), EXYNOS_PMUREG(0x0400));
}
#endif
return 0;
}
